.nav {
  width: 1200px;
  height: 90px;
  display: flex;
  margin: 0 auto;
}
.nav .logo {
  width: 200px;
  height: 90px;
  padding: 20px 0;
  margin-right: 140px;
}
.nav .logo img {
  width: 220px;
  height: 50px;
}
.nav ul {
  flex: 1;
  display: flex;
}
.nav ul li {
  height: 90px;
  padding: 0 40px;
}
.nav ul li a {
  padding: 0 15px;
  height: 100%;
  display: block;
  text-align: center;
  line-height: 90px;
  color: #333333;
  font-size: 18px;
  border-bottom: 2px solid #d6151a;
}
